Abnormal anther development and high sporopollenin synthesis in benzotriazole treated male sterile Helianthus annuus L.
Indian J Exp Biol
;
2008 Jan; 46(1): 71-8
Artigo
em Inglês
| IMSEAR
| ID: sea-61994
ABSTRACT
Foliar application of 1.5% benzotriazole induced 100% pollen sterility in H. annuus. Pollen abortion in treated plants was mainly associated with abnormal behaviour of tapetum. A limited number of anther locule showed early degeneration of tapetum followed by disintegration of sporogenous tissues. On the other hand, some locules showed normal development of tapetum at initial stages. However, this tapetum exhibited degenerated and non-functional cell organelles. In both these situations tapetum failed to provide proper nourishment to developing microspores. The ultrastructure of both tapetum and microspores is different from that of control material with irregularities of exine deposition, endopolyploidy of tapetal nuclei and an alteration of organelle composition being correlated with sterility. Pollen grains thus developed were devoid of nucleus and cell organelles and were complete sterile.
Texto completo:
DisponíveL
Índice:
IMSEAR (Sudeste Asiático)
Assunto principal:
Pólen
/
Triazóis
/
Extratos Vegetais
/
Microscopia Eletrônica
/
Fenômenos Fisiológicos Vegetais
/
Flores
/
Microscopia Eletrônica de Transmissão
/
Helianthus
Idioma:
Inglês
Revista:
Indian J Exp Biol
Ano de publicação:
2008
Tipo de documento:
Artigo
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